Curved rack



F. HORNBY.

cunvao RACK;

APPLICATION FILED AUG-3|, 1921.

1,412,1 16. Y Patented Apr. 11, 1922.-

2 SHEETS-SHEET l- INVENTOR flan/k 1 Q CB WMQ-M ATTORNEY-1' FRANK nonnnz' or rrvnnroori; n'n'eiinnn, lissrenoaro macaw LIVERPOOLYEYNVGLAND, A BRITISH CORPORATION.

LIMITED,

' overrun nnex.

To all whomtt may concern: .1

Be it known thatL FRANK HoRNBry'a subdrawings; in which:

form acornpletegear yvheel;

" gear -vheel ,=Fig.=5 is' an 7 ployed to-rock a cantileyer;

ject of the King-of Great Britain residing at :-Li\%erpool; England; have invented a new and-useful Improvement in Curved Racks,

of which the followingfis a specification".-

ourvedraok element for use in the building of constructional toyslma'de up .of interchangeable parts, the various parts after being utilized forgbuildi-ng up a toy or model'being capable of-being takenap'a rtfl and built tional toys it is desirablethat each part should be "interchangeableandfulfill sev- I eral functions so as to redu'cethe total numben'of-parts required inzan' outfit for-building many-*m0dels' The1 pre snt inyen-tion relates to? such a part. I 1

7 consists of a eurVed rackz or toothed segment of a circle such that while it Y may be secured atthe end of a. uniformly perforated metal According .to this. ini enti0n,'--th e element strip oribar and engaged by'fia pinion or wormto give a to and fro angular movement, za series o f-i'sueh parts may also befas sembledtogetheron a discor plate to-form acoinplete gearwhe'el. 7 One formof the-inventi0n= is illustrated the accompanying Fig. l shows-an elevatioii of raclron toothed segment; r

*Figi 2*is an end View-of the rack; V '7 a:

) curved Fig. 3 isfaneleyationishowing a 'seri es of the toothedlsegin'ents assembled together to this an end View of such a complete elevation of acurved rackern- Fig. 6 shows a curved rack employed to fproduce intermittent rotary motion of one sh aft from continuous rotary motion of an Ywith aworm to'oscillate a-perforated strip.

'f 'T-he curved r'aek :consistsof" a. flat sheetmetal plate halving a segmental-portion? 1 -and afceiit rally extending radial arm"2.

FThee eriphery; of the se 'mentv l is circular and provided-with a'uni?orm "series: of teeth 3, 111 the sheet-imeta'l-plate there 'are'pro distance betweenshafts 7 and? 10 times such standardpitch,

V Specification of'itetters liitent. impu ation filed August 31, 1921.- Seria1 nofesynes. a J

oftheiother elements in anoutfitfor us'eiin the building of e constructional"toys} and p I most desirably' are"cut} 0n, a radius} of the "ThIS invention "relates-to. an improved toothed peripheryfiy the outermost erform The curved rack may be attached 7) to 'tion being spaced the periphery a dis- I tanoe equal to the standard'fpitchaforesaid.

I v a strip 5 having standard pitch perforations e p ,whlch thus register With the perforations :4 up into" other models. In such "construc- 3 in the curvedr'ack, the strip and raokfbeingf heldtoge'thervg b b lt r d: h bug h a p I said perforations.-

afresult of; the! forat ons :L 111 the nanner described, ;a-*shaft '7, on WhlCl1 strip 5 is mounted-, "will" beat the center ofthe' toothedperiphery 3 'so' that V during oscillation tram 5 a gby recip} shafts '7 and .10 :Will be an integralniiinber -V of standard spaces. In "the case= shown in :Figgf. 7 Where the piniolfh'as 'a-radiu's equal to the standard pitchof perforations; the

a s f The radius ofrtheftoothed periphei" thejl'qurved rack' ma equal any"; -'integ ral number times the standard pitc-hf of-theper 1 for'ati'ons, in the raok' 'shjown ii'nj'Fig' 1 the radius being three gtimes such pitrh Thus,

1 matter what cooperating part -from "the -construetional outfit is secured to the curved rack there will always occur aperforation at the' eenter of thetoothed periphery, and -the pitch ma y-be defined asan aliquot part ofthe radiusof 'suchperiphery; V

Whi1e1=t111e rack segment '-may[ extend,

' throughany'arc of a ciro'leg it [most desir- I ably e'xtends th'rough an a1iqum,- arto a When the rack is oflsu'ohe an "GXtGI IUEVIiHHij ber of racks may conveniently be mounted, asshown in Fig. 3', -upon:a'disk ll-h'ai ing I through perforations 't and the perforations I in the "late Withwhioh they register f'Thus" "a comp ete geari- Wheel} may" be speed lycon- 7 structed, there being provided a hub 13 consisting of a tubular boss suitably secured to register with the central perforation of disk 11.

In Fig. 5 there is shown a rack l secured to a crank let rigidly mounted on a shaft- 7 carried by suitable bearings (not shown). A- cantilever comprising three perforated strips 15 is likewise rigidly mounted on shaft 7. A pinion 9 may be rigidly mounted on a shaft 10 to cooperatejwith the teeth 3 of segmentl so that rotation of shaft 10 willmovethe rackrto rock the cantilever in the direction' indicated by the arrows, illustrating the principle of a lift bridge. As described in connection with. Fig. 7, the dimensions- 0f the various partsnare-such that shafts? and 10 may be mounted in perforations of the usual rectangular perforated plates (not shown), the distance be tween said shafts equaling five times the standard pitchrj v Fig. 6 illustrates/the translation of uniform icirculartmotion of a shaft 7"into intermittent circular motion of a shaft' 10. A crank i '14v is rigidly secured on shaft 7 and carries at its outer. end asegment-lfi' The teeth 3"will*engage the teeth of a'pinion '9 mounted for-rotation with ashaft l0 during one-fourth ofeachlrevolu'tion-of shaft 7 thereby causing: shaft .10 tourotate as indicated by; the'arro'ws. In this case-also, shafts 7 and 10 may be mounted at a distance of five perforations: in any of' the standard pieces supplied with toy building outfits.

a Fig. 8 illustrates the cooperation between a curved rack segment and a worm. The rack-1 isi secured to a perforated strip 5 r0- tatably mounted on a suitably supported shaft 7. A Worm:l6,1 mounted on a trans verse shaft 17, cooperates with teeth 3 to move the rackand oscillate the strip in response' to rotation of shaft 17. v

While onegembodiment of the invention and a number of its applications have been described in detail, it is to be understood that the inventionis notlimited to such description but may be varied within the scope "of the appended claims without in any case departing from its spirit. For example. the segment- 1 may have additional perforations positioned other than radiallyto cooperate with perforations on standard parts other than those shown, in whichcase the radius ofthe toothed periphery-3 may bedtc'r- 'minedregardless of-the pitch of the standard perforations. Moreover, the are described by the rack segment maybe any fraction of acircle and a number of segments, difi'eringin extent. maybe assembled toform a complete-gear wheel rather than anumber of identical: segments, as described. Again, thesegments may be assembled on 'a pair f'o'f crossed strips rather thanupon a terminating'short of the center of the pe riphery, and a plurality of radially disposed perforationsinthe radialxarm wherebyithe rack may be rigidly secured-to a radiallyextending strip.

2. A curved rack for use in the constructionof working models, toys or'the like, coinprisinq asheet-metal plate having a circular arcuatetoothed periphery and acentrally extendingradialarm, said plate having perforations, to. register with standard perforations in. other; elementsxof a toy construction outfit,

3. A c'urvedrackfoi use in therconstruca tion of working models, toys or the like, comprising a sheet-metal plate having a circulararcuate toothedperiphery, a radial arm extending towardthe center of said periphery,1 and a plurality of radially disposed perforationsythe centers .of said perforationsbeing distant from each 'other'an'aliquot p-art'o-f the radiusfof said periphery and distant from the peripheryan integral number of said distances from each other.

41-. A gear-wheel for use in the construction of working'models, :tOYSCOI the like,

comprising a plurality of' fiat sheet=metal die-cut blanks having arouatetoothed .peripheries of equal radii,- and means comprising a die-cut flat sheet metal disc for maintainin'gsaidplates in predetermined relative position formingaa comp'leteucircle.

5. In a gear-wheel for use/in the construction of working models, toys or the likeythe combination of a plurality of flat die c ut sheet-metal segments of. acirclepeach segment having radial edges, astandard toothed periphery and radial perforations placed according to a predetermined standard, of

a fiat die-cut sheet-metal blank provided with standard perforations registering with the perforations in-sa-id segments, and means for securing said segments to said blank to form a gear-wheel.

6.. A curved rack for use-in the construction of workingmodels, toys or the like, comprisinga sheet-metal plate having a cir- .cular arcuate toothed periphery and a centrally extending radial arm, said plate having perforations to register with standard perforations in otherv elements of a toy construction. outfit, and saidtoothedaperiphery tions being distant from each other'an aliquot part of the radius of said periphery and distant from'theperipheryan integral 7 number of said distances fromea'oh other,'-'- I and said toothed periphery extending through an aliquotp'art of a circle whereby a number of identical racks may be assembled to form a gear-Wheel;

[ 'V'FRANKV HORNE l. 

